function FunClkBigPic()
{
	mask.style.visibility='visible';
	massage_box.style.visibility='visible';
	mask.style.width=document.body.clientWidth;
	mask.style.height=GetClientHeight()+40;
	massage_box.style.left=(document.body.clientWidth-605+50)/2;
	massage_box.style.top=(window.screen.availHeight-my_form.offsetHeight-160)/2+GetscrollTop();
	topx=parseInt(my_form.style.left);
    topy=parseInt(my_form.style.top);
}
function GetscrollTop(){
    if(document.body.scrollTop){
        return document.body.scrollTop;
    }
    else{
        return document.documentElement.scrollTop;
    }
}
function GetClientHeight(){
    if(document.body.clientHeight){
        return document.body.clientHeight;
    }
    else{
        return document.documentElement.clientHeight;
    }
}
function FunHideBigPic()
{
    document.getElementById("massage_box").style.visibility='hidden'; 
    document.getElementById("mask").style.visibility='hidden';
    document.getElementById("mask").style.width=0;
    document.getElementById("mask").style.Height=0;
}