function show(event, _this, mess) {
event = event || window.event;
var t1="<img src='" + _this + "'>";
document.getElementById(mess).innerHTML =t1;
//document.getElementById("a1").innerHTML = "<img src='" + _this.src + "' >";
document.getElementById(mess).style.top = window.document.documentElement.scrollTop + event.clientY + 10 + "px";
document.getElementById(mess).style.left = window.document.documentElement.scrollLeft + event.clientX + 10 + "px"; //document.body
document.getElementById(mess).style.display = "block";
}
function hide(_this, mess) {
document.getElementById(mess).innerHTML = "";
document.getElementById(mess).style.display = "none";
}