function rollImgOn(obj){file=obj.src;obj.src=file.replace('_Off','_On');}
function rollImgOff(obj){file=obj.src;obj.src=file.replace('_On','_Off');}

function rollOn(obj){obj.className=obj.className.replace('_Off','_On');}
function rollOff(obj){obj.className=obj.className.replace('_On','_Off');}

var Key='';
function keyhandler(e){
   	if ((Key >=48 && Key <=57) || (Key >=96 && Key <=105) || Key==46 || Key==8 || Key==9 || (Key >=37 && Key <=40)){return true}else{return false};
}

function validarEmail(valor){
	if(/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(valor)){return (true);}else{return (false);}
}