function resize(){
    var ta=document.getElementById("cont");
    var myh=getBrowserHeight();

    var mycss="height:"+myh+"px;";
    ta.style.cssText=mycss;
}
function getBrowserHeight() {  
    if ( window.innerHeight ) {
        return window.innerHeight; 
    } 
    else if ( document.documentElement && document.documentElement.clientHeight != 0 ) {
        return document.documentElement.clientHeight; 
    }
    else if ( document.body ) {
        return document.body.clientHeight;
    }
    return 0;  
}