function convert(value)
{
		return value.toFixed(2) * 2;	//1Ôª±ä2Ôª
}


Number.prototype.floor_float = function()
{
	var a = this.toString().split('.');
	var dd = "";
	if(a.length == 2)
	{
		var dd = a[1].substr(0, 2);
	}
	return parseFloat(a[0] + "." + dd).toFixed(2);
}


Number.prototype.getrate=function(){ 
	var s = this.toString(10);
	if(s.indexOf(".")==-1){
		return 1;
	}else{
		return Math.pow(10,parseInt(s.length - s.indexOf(".")-1));
	}
}

function tran(a1, a2){
    /*var m=0,s1=a1.toString(10),s2=a2.toString(10);
    try{m+=s1.split(".")[1].length}catch(e){}
    try{m+=s2.split(".")[1].length}catch(e){}
    return Number(s1.replace(".",""))*Number(s2.replace(".",""))/Math.pow(10,m);
	*/
	a = Math.ceil(a1*10000000);
	b = Math.ceil(a2*1000);
	return a*b/10000000000;
}