function chek_digits(obj){
                var pattern=/[^0-9]/gi;
                var reg = new RegExp (pattern);
                
                var value=obj.value;
                
                obj.value=value.replace(reg,'');
                
                }
function png(img){

if(navigator.userAgent.toLowerCase().indexOf('msie')>0){
	img.style.filter="progid:DXImageTransform.Microsoft.AlphaImageLoader(src='"+img.src+"', sizingMethod='scale')";
	img.onload='';
	img.src="img/prozr.gif";
	}
}