function addEvent(elm,evType,fn,useCapture){if(elm.addEventListener){elm.addEventListener(evType,fn,useCapture);return true;}
else if(elm.attachEvent){var r=elm.attachEvent('on'+ evType,fn);return r;}
else{elm['on'+ evType]=fn;}}
function addLoadEvent(func)
{addEvent(window,'load',func,false);}
function elt(id){return document.getElementById(id);}
function celt(val){return document.createElement(val);}