var chart_url = gchart_build({ "cht" : "bvs", "chs" : "400x250", "chbh" : "14,2,0", "chd" : "t:3,4,4,1,3,2,2,0,1,3,11,5,7,5,5,7,7,5,3,2,3,3,6,6", "chds" : "0,11" }); document.getElementById('gchart_test_img').src = chart_url; document.getElementById('gchart_test_field').value = chart_url;