var x = 0; 
function openPage_tool(url,width,height,options) 
{ 
var top=(screen.height-height)/2; 
var left=(screen.width-width)/2; 
myWin = open(url,"","top="+top+",left="+left+",width="+width+",height="+height+","+options); 
x = 1; 
}