how to display slash dynamically when entering date in textbox and disabling copy and paste

include below functions in script tag of head tag in html

function rightclick(event)
{
if (event.button==2)
{
alert("Not Allow Right Click!");
}

}



function numCheck()
{

var keyCode = event.keyCode;
var s=document.getElementById('t1');

if (keyCode > 31 &&(keyCode <48 || keyCode >57) )
event.returnValue = false;

else
{


if( s.value.length==2)
{
//alert(s.value);

s.value=s.value+"/";
if(keyCode==8)
{
s.value="";
}
return s.value;
event.returnValue = true;
}
if(s.value.length==5)
{

s.value=s.value+"/";
if(keyCode==8)
{
s.value="";
}
return s.value;
event.returnValue = true;
}
if(s.value.length==8)
{

s.value=s.value;
if(keyCode==8)
{
s.value="";
}
return s.value;
event.returnValue = true;
}
}
if(s.value.length==10)
{
//if(keyCode==8)
//{
//s.value="";
//}
//return s.value;
event.returnValue = false;
}

}






include onMouseDown="rightclick(event)" onkeydown="numCheck;" events in your textbox