function SoloNumeros()
	{
		if ( ( (parseInt(window.event.keyCode) < 48) || ( parseInt(window.event.keyCode) > 57 ) ) && ( parseInt(window.event.keyCode) != 13 )) 
			{
			window.event.keyCode = 0; 
			}
	}
	
function SoloAlfa()
	{
		if (parseInt(window.event.keyCode) != 32)
		{
			if (parseInt(window.event.keyCode) < 65)
			{
				window.event.keyCode = 0;
				return; 
			}
		
			if (parseInt(window.event.keyCode) > 90 && parseInt(window.event.keyCode) < 97)
			{
				window.event.keyCode = 0; 
				return;
			}
		
			if (parseInt(window.event.keyCode) > 122)
			{
				window.event.keyCode = 0; 
				return;
			}
		}
	}
	
function AlfaNumeros()
	{
		if (parseInt(window.event.keyCode) < 48)
		{
			window.event.keyCode = 0;
			return; 
		}
		
		if (parseInt(window.event.keyCode) > 57 && parseInt(window.event.keyCode) < 65)
		{
			window.event.keyCode = 0; 
			return;
		}
		
		if (parseInt(window.event.keyCode) > 90 && parseInt(window.event.keyCode) < 97)
		{
			window.event.keyCode = 0; 
			return;
		}
		
		if (parseInt(window.event.keyCode) > 122)
		{
			window.event.keyCode = 0; 
			return;
		}
	}