function view(doc) {
              var allSpans=document.getElementsByTagName("span");
              if(doc=="old") {
                for(i=0;i!=allSpans.length;i++) {
                  var name=allSpans[i].className;
                  if(name=="deltaxml-new" || name=="deltaxml-new-img" || name=="deltaxml-new-format") {
                    allSpans[i].style.display="none";
                  } else if (name=="deltaxml-old" || name=="deltaxml-old-img" || name=="deltaxml-old-format") {
                    allSpans[i].style.display="inline";
                    allSpans[i].style.background="#FFF";
                    //need to take border off images
                    var allImgs=allSpans[i].getElementsByTagName("img");
                    for(j=0;j!=allImgs.length;j++) {
                      allImgs[j].style.border="none";
                    }
                  }
                }
              } else if(doc=="new") {
                for(i=0;i!=allSpans.length;i++) {
                  var name=allSpans[i].className;
                  if(name=="deltaxml-new" || name=="deltaxml-new-img" || name=="deltaxml-new-format") {
                    allSpans[i].style.display="inline";
                    allSpans[i].style.background="#FFF";
                    //need to take border off images
                    var allImgs=allSpans[i].getElementsByTagName("img");
                    for(j=0;j!=allImgs.length;j++) {
                      allImgs[j].style.border="none";
                    }
                  } else if (name=="deltaxml-old" || name=="deltaxml-old-img" || name=="deltaxml-old-format") {
                    allSpans[i].style.display="none";
                   }
                }
              } else if(doc=="both") {
                for(i=0;i!=allSpans.length;i++) {
                  var name=allSpans[i].className;
                  if(name=="deltaxml-new" || name=="deltaxml-new-format" || name=="deltaxml-new-img") {
                    allSpans[i].style.display="inline";
                    allSpans[i].style.background="#90EE90";
                    //need to add border to images
                    var allImgs=allSpans[i].getElementsByTagName("img");
                    for(j=0;j!=allImgs.length;j++) {
                      allImgs[j].style.border="2px solid green";
                    }
                  } else if(name=="deltaxml-old" || name=="deltaxml-old-format" || name=="deltaxml-old-img") {
                    allSpans[i].style.display="inline";
                    allSpans[i].style.background="#FF5555";
                    //need to add border to images
                    var allImgs=allSpans[i].getElementsByTagName("img");
                    for(j=0;j!=allImgs.length;j++) {
                      allImgs[j].style.border="2px solid red";
                    }
                  }
                }
              } else if(doc=="both-no-format") {
                for(i=0;i!=allSpans.length;i++) {
                  var name=allSpans[i].className;
                  if(name=="deltaxml-new" || name=="deltaxml-new-img") {
                    allSpans[i].style.display="inline";
                    allSpans[i].style.background="#90EE90";
                    //need to add border to images
                    var allImgs=allSpans[i].getElementsByTagName("img");
                    for(j=0;j!=allImgs.length;j++) {
                      allImgs[j].style.border="2px solid green";
                    }
                  } else if(name=="deltaxml-old" || name=="deltaxml-old-img") {
                    allSpans[i].style.display="inline";
                    allSpans[i].style.background="#FF5555";
                    //need to add border to images
                    var allImgs=allSpans[i].getElementsByTagName("img");
                    for(j=0;j!=allImgs.length;j++) {
                      allImgs[j].style.border="2px solid red";
                    }
                  } else if (name=="deltaxml-new-format") {
                    allSpans[i].style.display="inline";
                    allSpans[i].style.background="#FFF";
                  } else if(name=="deltaxml-old-format") {
                    allSpans[i].style.display="none";
                  }
                }
              }
            }