function ujkep(){k1.src='matpic/portal2.png';return true;}
	function regikep(){k1.src='matpic/portal.png';return true;}

document.write("<a href='http://www.wiris.com/wiris/en/index.html' target='_top'><img src='matpic/portal.png' alt='WIRIS, your web calculator' name='k1' id='k1' width='104' height='22' vspace='5' border='0' onDblClick='regikep()' onMouseOver='ujkep()' onMouseOut='regikep()'></a>")