  <script type="text/javascript">
      window.onload = function(){
          var spread = new GC.Spread.Sheets.Workbook(document.getElementById("ss"),{sheetCount:3});
          var activeSheet = spread.getActiveSheet(); 

          $("#ss").click(function (e) {
              //Acquire cell index from mouse-clicked point of regular cells which are neither fixed rows/columns nor row/column headers.
              var offset = $("#ss").offset();
              var x = e.pageX - offset.left;
              var y = e.pageY - offset.top;
              var target = spread.hitTest(x, y);

              if(target.worksheetHitInfo) {
                  if(target.worksheetHitInfo.hitTestType === 0) {
                      str = 'corner';
                  } else if (target.worksheetHitInfo.hitTestType === 1) {
                      str = 'colHeader';
                  } else if (target.worksheetHitInfo.hitTestType === 2) {
                      str = 'rowHeader';
                  } else {
                      str = 'viewport';
                  }
              } else if(target.tabStripHitInfo) {
                  if(target.tabStripHitInfo.navButton){
                      str = target.tabStripHitInfo.navButton;
                  } else if(target.tabStripHitInfo.sheetTab) {
                      str = target.tabStripHitInfo.sheetTab.sheetName;
                  } else if(target.tabStripHitInfo.resize === true) {
                      str = "resize";
                  } else {
                      str = "blank";
                  }
              } else if(target.horizontalScrollBarHitInfo) {
                  str = target.horizontalScrollBarHitInfo.element;
              } else if(target.verticalScrollBarHitInfo) {
                  str = target.verticalScrollBarHitInfo.element;
              } else if(target.footerCornerHitInfo) {
                  str = target.footerCornerHitInfo.element;
              }
        alert(str);                             
});
}
</script>