function drItem(str){
	this.k = str.split("|")[0]
	this.v = str.split("|")[1]
	this.sub = new Array();
}
drObj = new Array();

drObj[0] = new drItem('0|显卡');
drObj[0].sub[0] = new drItem('0|神驹系列 PCI-E');
drObj[0].sub[0].sub[0] = new drItem('神驹 8800GT 512MB |../support/download.php?pc_cate=vga&pcid=1&pro_id=23');
drObj[0].sub[0].sub[1] = new drItem('神驹 8800Ultra 768MB |../support/download.php?pc_cate=vga&pcid=1&pro_id=13');
drObj[0].sub[0].sub[2] = new drItem('神驹 8800GTS 320MB |../support/download.php?pc_cate=vga&pcid=1&pro_id=15');
drObj[0].sub[0].sub[3] = new drItem('神驹 8600GTS 黃金版 |../support/download.php?pc_cate=vga&pcid=1&pro_id=7');
drObj[0].sub[0].sub[4] = new drItem('神驹 8600GTS  |../support/download.php?pc_cate=vga&pcid=1&pro_id=9');
drObj[0].sub[0].sub[5] = new drItem('神驹 8600GT 黃金版 |../support/download.php?pc_cate=vga&pcid=1&pro_id=4');
drObj[0].sub[0].sub[6] = new drItem('神驹 8600GT 红旗版Ⅲ型 |../support/download.php?pc_cate=vga&pcid=1&pro_id=21');
drObj[0].sub[0].sub[7] = new drItem('神驹 8600GT 红旗版 |../support/download.php?pc_cate=vga&pcid=1&pro_id=22');
drObj[0].sub[0].sub[8] = new drItem('神驹 8600GT 静音版 |../support/download.php?pc_cate=vga&pcid=1&pro_id=8');
drObj[0].sub[0].sub[9] = new drItem('神驹 8600GT红缨版 |../support/download.php?pc_cate=vga&pcid=1&pro_id=20');
drObj[0].sub[0].sub[10] = new drItem('神驹 8500GT 256MB 静音版 |../support/download.php?pc_cate=vga&pcid=1&pro_id=16');
drObj[0].sub[0].sub[11] = new drItem('神驹 8500GT 红缨版 |../support/download.php?pc_cate=vga&pcid=1&pro_id=19');
drObj[0].sub[0].sub[12] = new drItem('神驹 7600GT 256MB 静音版 |../support/download.php?pc_cate=vga&pcid=1&pro_id=17');
drObj[0].sub[0].sub[13] = new drItem('神驹 7600GS 白金版 |../support/download.php?pc_cate=vga&pcid=1&pro_id=10');
drObj[0].sub[0].sub[14] = new drItem('神驹 7300GT 白金版 |../support/download.php?pc_cate=vga&pcid=1&pro_id=11');
drObj[0].sub[0].sub[15] = new drItem('神驹 7300GT 256MB 静音版 |../support/download.php?pc_cate=vga&pcid=1&pro_id=18');
drObj[0].sub[0].sub[16] = new drItem('神驹 8500GT 512M 静音版 |../support/download.php?pc_cate=vga&pcid=1&pro_id=24');
drObj[0].sub[0].sub[17] = new drItem('神驹 8600GT 512M 静音版 |../support/download.php?pc_cate=vga&pcid=1&pro_id=26');
drObj[0].sub[0].sub[18] = new drItem('神驹 8800GT 512M 孙权版 |../support/download.php?pc_cate=vga&pcid=1&pro_id=27');
drObj[0].sub[0].sub[19] = new drItem('神驹 8800GT 256M 刘备版 |../support/download.php?pc_cate=vga&pcid=1&pro_id=28');
drObj[0].sub[0].sub[20] = new drItem('神驹 8800GT  512M 曹操版 |../support/download.php?pc_cate=vga&pcid=1&pro_id=29');
drObj[0].sub[0].sub[21] = new drItem('神驹 8800GS 768M 大乔版 |../support/download.php?pc_cate=vga&pcid=1&pro_id=30');
drObj[0].sub[0].sub[22] = new drItem('神驹 9600GT 512M 红樱版 |../support/download.php?pc_cate=vga&pcid=1&pro_id=31');
drObj[0].sub[0].sub[23] = new drItem('神驹 8800GS 384M 小乔版 |../support/download.php?pc_cate=vga&pcid=1&pro_id=32');
drObj[0].sub[0].sub[24] = new drItem('神驹 9600GT 512M 红旗H版 |../support/download.php?pc_cate=vga&pcid=1&pro_id=33');
drObj[0].sub[0].sub[25] = new drItem('神驹 9800GX2 1024M |../support/download.php?pc_cate=vga&pcid=1&pro_id=34');
drObj[0].sub[0].sub[26] = new drItem('神驹 9800GTX 512M |../support/download.php?pc_cate=vga&pcid=1&pro_id=35');
drObj[0].sub[0].sub[27] = new drItem('神驹 GTX280 1024MB |../support/download.php?pc_cate=vga&pcid=1&pro_id=36');
drObj[0].sub[0].sub[28] = new drItem('神驹 GTX260 896MB |../support/download.php?pc_cate=vga&pcid=1&pro_id=37');
drObj[0].sub[1] = new drItem('1|镭X系列 PCI-E');
drObj[0].sub[1].sub[0] = new drItem('镭X HD4850 512MB |../support/download.php?pc_cate=vga&pcid=3&pro_id=38');
drObj[0].sub[1].sub[1] = new drItem('镭X HD4870 512MB |../support/download.php?pc_cate=vga&pcid=3&pro_id=39');
drObj[0].sub[1].sub[2] = new drItem('镭X HD3870 512MB |../support/download.php?pc_cate=vga&pcid=3&pro_id=40');
drObj[0].sub[1].sub[3] = new drItem('镭X HD3850 512MB |../support/download.php?pc_cate=vga&pcid=3&pro_id=41');
drObj[0].sub[1].sub[4] = new drItem('镭X HD3850 1024MB |../support/download.php?pc_cate=vga&pcid=3&pro_id=42');
drObj[0].sub[1].sub[5] = new drItem('镭X HD3850 256MB |../support/download.php?pc_cate=vga&pcid=3&pro_id=43');
drObj[0].sub[1].sub[6] = new drItem('镭X HD3850 512MB |../support/download.php?pc_cate=vga&pcid=3&pro_id=44');

drUtil = {
	sPc : new Object(),
	sPro : new Object(),
	sOs : new Object(),
	init : function(){
		this.sPc = document.getElementById("sPc");
		this.sPro = document.getElementById("sPro");
		this.sOs = document.getElementById("sOs");
		for(i=0; i<drObj.length; i++){
			this.sPc.options[i+1] = new Option(drObj[i].v, i);
		}
		this.sPc.onchange = this.pcChg;
		this.sPro.onchange = this.proChg;
		this.sOs.onchange = this.osChg;		
	},
	clear : function(obj){
		while(obj.options.length > 1){
			obj.options[1] = null
		}
	},
	pcChg : function (){
		var pcIndex = drUtil.sPc.selectedIndex;
		drUtil.clear(drUtil.sPro);
			drUtil.clear(drUtil.sOs);
		if (pcIndex){
			for(var i=0; i<drObj[pcIndex - 1].sub.length; i++){
				drUtil.sPro.options[i+1] = new Option(drObj[pcIndex - 1].sub[i].v, i);
			}
		}
	},
	proChg : function(){
		var pcIndex = drUtil.sPc.selectedIndex;
		var proIndex = drUtil.sPro.selectedIndex;
		drUtil.clear(drUtil.sOs);
		if (proIndex){
			for(var i=0; i<drObj[pcIndex - 1].sub[proIndex - 1].sub.length; i++){
				drUtil.sOs.options[i+1] = new Option(drObj[pcIndex - 1].sub[proIndex - 1].sub[i].k, drObj[pcIndex - 1].sub[proIndex - 1].sub[i].v);
			}
		}
	},
	osChg : function(){

		document.getElementById("if1").src = drUtil.sOs.value;
		window.location.replace(drUtil.sOs.value);
		//drUtil.sOs.selectedIndex = 0;
		
	}
}