function procase(val){
	var overColor = "url(images/index_cases2_btn2.jpg)";
	var outColor = "url(images/index_cases2_btn.jpg)";
	var overtxt = "black"
	var outtxt = "black"
	switch(val)
	{
		case 1:
			document.getElementById("pbox1").style.display='';
			document.getElementById("pbox2").style.display='none';
			document.getElementById("pbox3").style.display='none';
			
			document.getElementById("ptn1").style.backgroundImage =overColor;
			document.getElementById("ptn2").style.backgroundImage =outColor;
			document.getElementById("ptn3").style.backgroundImage =outColor;
			
			document.getElementById("ptn1").style.color = overtxt;
			document.getElementById("ptn2").style.color = outtxt;
			document.getElementById("ptn3").style.color = outtxt;
			
			break;
			
		case 2:
			document.getElementById("pbox1").style.display='none';
			document.getElementById("pbox2").style.display='';
			document.getElementById("pbox3").style.display='none';
			
			document.getElementById("ptn1").style.backgroundImage =outColor;
			document.getElementById("ptn2").style.backgroundImage =overColor;
			document.getElementById("ptn3").style.backgroundImage =outColor;
			
			document.getElementById("ptn1").style.color = outtxt;
			document.getElementById("ptn2").style.color = overtxt;
			document.getElementById("ptn3").style.color = outtxt;
			break;
			
		case 3:
			document.getElementById("pbox1").style.display='none';
			document.getElementById("pbox2").style.display='none';
			document.getElementById("pbox3").style.display='';
			
			document.getElementById("ptn1").style.backgroundImage =outColor;
			document.getElementById("ptn2").style.backgroundImage =outColor;
			document.getElementById("ptn3").style.backgroundImage =overColor;
			
			document.getElementById("ptn1").style.color = outtxt;
			document.getElementById("ptn2").style.color = outtxt;
			document.getElementById("ptn3").style.color = overtxt;
			break;
	}
}