function check_form(){

if (dataform.prodkey.value=="") {	
alert ("ÇëÊäÈëËÑË÷¹Ø¼ü´Ê");
dataform.prodkey.focus();
return false;
}
return true;

}

function echeck_form(){

if (dataform.prodkey.value=="") {	
alert ("Pls input keywords");
dataform.prodkey.focus();
return false;
}
return true;

}

function newin(fname,w,h){

var win = null;
var myname="";
var scroll="yes";

LeftPosition = (screen.width) ? (screen.width-w)/2 : 0;
TopPosition = (screen.height) ? (screen.height-h)/2 : 0;
settings =
'height='+h+',width='+w+',top='+TopPosition+',left='+LeftPosition+',scrollbars='+scroll+',resizable'
win = window.open(fname,myname,settings)
}