jQuery.fn.onlypressnum=function(){$(this).bind("keypress",function(e){if(e.ctrlKey==true||e.shiftKey==true)return false;if((e.which>=48&&e.which<=57&&e.ctrlKey==false&&e.shiftKey==false)||e.which==0||e.which==8)return true;else if(e.ctrlKey==true&&(e.which==99||e.which==118))return false;else return false;})
$(this).bind("contextmenu",function(){return false;})
$(this).bind("drop",function(){return false;})
$(this).bind("paste",function(){return false;});};