if (document.images) {
	student_01_on = new Image();				// roll over Images
	student_01_on.src ="images/leftmenu_student01b.gif";
	student_02_on = new Image();
	student_02_on.src ="images/leftmenu_student02b.gif";
	student_03_on = new Image();
	student_03_on.src ="images/leftmenu_student03b.gif";
	student_04_on = new Image();
	student_04_on.src ="images/leftmenu_student04b.gif";
	student_05_on = new Image();
	student_05_on.src ="images/leftmenu_student05b.gif";
	student_06_on = new Image();
	student_06_on.src ="images/leftmenu_student06b.gif";
	student_07_on = new Image();
	student_07_on.src ="images/leftmenu_student07b.gif";


	



	student_01_off = new Image();				// Original Images
	student_01_off.src ="images/leftmenu_student01a.gif";
	student_02_off = new Image();
	student_02_off.src ="images/leftmenu_student02a.gif";
	student_03_off = new Image();
	student_03_off.src ="images/leftmenu_student03a.gif";
	student_04_off = new Image();
	student_04_off.src ="images/leftmenu_student04a.gif";
	student_05_off = new Image();
	student_05_off.src ="images/leftmenu_student05a.gif";
	student_06_off = new Image();
	student_06_off.src ="images/leftmenu_student06a.gif";
	student_07_off = new Image();
	student_07_off.src ="images/leftmenu_student07a.gif";


	

}

// Function to 'activate' images.
function imgOn(imgName) {
	if (document.images) {
		document[imgName].src = eval(imgName + "_on.src");
	}
}

// Function to 'deactivate' images.
function imgOff(imgName) {
	if (document.images) {
		document[imgName].src = eval(imgName + "_off.src");
	}
}