function sum()
{
	if (checkpriform())
	{
	var pdian = parseFloat(form1.dian.value);
	var pgui = parseFloat(form1.gui.value);
	var pgang = parseFloat(form1.gang.value);
	var pjiao = parseFloat(form1.jiao.value);
	var index = parseInt(form1.product.options[form1.product.selectedIndex].value);
	var diansum = "";
	var staysum = "";
	var productarr = new Array(8);
	var stayarr = new Array(8);
	productarr[0] = new Array(9000,1.8,0.22,0.9);
	productarr[1] = new Array(4800,0.25,3.1,0.55);
	productarr[2] = new Array(3300,0.09,2.2,0.48);
	productarr[3] = new Array(12000,2.5,0.6,0.9);
	productarr[4] = new Array(3100,3.3,0.6,0);
	productarr[5] = new Array(0,1.35,0.4,0.07);
	productarr[6] = new Array(1400,1.35,0.95,0);
	productarr[7] = new Array(2100,1.5,0.58,0);
	stayarr[0] = 75+70+100+50;
	stayarr[1] = 50+60+50+20;
	stayarr[2] = 35+55+28;
	stayarr[3] = 700;
	stayarr[4] = 140+40+70+45;
	stayarr[5] = 240+300+100+300;
	stayarr[6] = 290+35+65+130;
	stayarr[7] = 10+350+40+70+80;
	diansum = parseFloat(pdian*productarr[index][0])+parseFloat(pgui*productarr[index][1])+parseFloat(pgang*productarr[index][2])+parseFloat(pjiao*productarr[index][3]);
	staysum = parseFloat(stayarr[index]);
	var issum = diansum+staysum;
	//alert(issum);
	document.getElementById("pcount").innerHTML = issum.toFixed(2);
	document.getElementById("sumprice").src="/PriceSum.asp?Ptype="+index+"&PS0="+parseFloat(pdian).toFixed(2)+"&PS1="+parseFloat(pgui).toFixed(2)+"&PS2="+parseFloat(pgang).toFixed(2)+"&PS3="+parseFloat(pjiao).toFixed(2)+"&PSsum="+issum.toFixed(2);
	}
	else
	{
		document.getElementById("count").innerHTML=0;
		document.getElementById("sumprice").src="";
	}
}

function change()
{
	var index = parseInt(form1.product.options[form1.product.selectedIndex].value);
	var tagarr = new Array(8);
	var picarr = new Array(8);
	tagarr[0] = new Array("¹èʯ","¸Öм","½¹Ì¿");
	tagarr[1] = new Array("¹èʯ","Èë¯ÃÌ¿ó","½¹Ì¿");
	tagarr[2] = new Array("¹èʯ","¸õ¿ó","½¹Ì¿");
	tagarr[3] = new Array("¹èʯ","Óͽ¹","ľ̿");
	tagarr[4] = new Array("Èë¯ÃÌ¿ó","½¹Ì¿","");
	tagarr[5] = new Array("Êìî⾫¿ó","¹èÌú(75%)","ÂÁÁ£(99%)");
	tagarr[6] = new Array("Èë¯ÃÌ¿ó","Ã̹è","");
	tagarr[7] = new Array("¸õ¿ó","¸õ¹è","");

	picarr[0] = new Array("","","");
	picarr[1] = new Array("","(Mn30%Mn/Fe¡Ý6.5Mn/P¡Ý300)","");
	picarr[2] = new Array("","(43%Cr<sub>2</sub>O<sub>3</sub>¼Æ)","");
	picarr[3] = new Array("","","");
	picarr[4] = new Array("(28%¼Æ)","(Mn28%Mn/Fe¡Ý4.8Mn/P¡Ý180)","");
	picarr[5] = new Array("","","");
	picarr[6] = new Array("(40%¼Æ)","(FeMn68Si18¼Æ)","");
	picarr[7] = new Array("(Cr<sub>2</sub>O<sub>3</sub>40%¼Æ)","(FeCr30Si40¼Æ)","");

	document.getElementById("show1").innerText = tagarr[index][0];
	document.getElementById("show2").innerText = tagarr[index][1];
	document.getElementById("show3").innerText = tagarr[index][2];

	document.getElementById("mess1").innerHTML = picarr[index][0];
	document.getElementById("mess2").innerHTML = picarr[index][1];
	document.getElementById("mess3").innerHTML = picarr[index][2];	
	switch(index)
	{
		case 4:
			document.getElementById("jiao").disabled=true;
			break;
		case 1:
		        document.getElementById("mess4").innerHTML = "(Mn30%Mn/Fe¡Ý6.5Mn/P¡Ý300)";
			document.form1.jiao.disabled=false;
			break;
		case 6:
			document.getElementById("jiao").disabled=true;
			break;
		case 7:
			document.getElementById("jiao").disabled=true;
			break;
		case 2:
			document.getElementById("jiao").disabled=false;
			break;
		default:
			document.getElementById("mess4").innerHTML = "";
			document.getElementById("jiao").disabled=false;
	}



}

 function  isNumeric(str){   
      return  (str.search(/^[\+\-]?\d+\.?\d*$/)==0)   
} 

function checkpriform(){
	
		var user = false;
	
	if (!user)
	{
		alert("ÇëÏȵǼ£¡");
		return false;
	}
	if (isNumeric(form1.dian.value)&&isNumeric(form1.gui.value)&&isNumeric(form1.gang.value)&&isNumeric(form1.jiao.value))
	{
		return true;
	}
	else
	{
		alert("ÇëÌîдÊý×Ö£¡");
		return false;
	}
}