function hide_table(table_id1, table_id2) {
// hide needed <table>
document.getElementById(table_id1).style.display = "none";
document.getElementById(table_id2).style.display = ""
};
function show_table(table_id1, table_id2) {

// show needed <table>
document.getElementById(table_id1).style.display = '';
document.getElementById(table_id2).style.display = "none"

}; 
function init_fields() {
var switchValue = document.getElementById("switchOff").checked;
if (switchValue==true) {
    document.getElementById("hiddenTable").style.display = "none"
    document.getElementById("SearchFor").style.display = ""
}
else {
    document.getElementById("hiddenTable").style.display = ""
    document.getElementById("SearchFor").style.display = "none"
};
}
function show_ISTC_projects() {
var searchArea = document.getElementById("searchArea").value;
if (searchArea =="Projects") {
    document.getElementById("ISTC_Projects").style.display = ""
    document.getElementById("Projects_attrib").style.display = ""
}
else {
    document.getElementById("ISTC_Projects").style.display = "none"
    document.getElementById("Projects_attrib").style.display = "none"
};
if (searchArea =="Institutions") {
    document.getElementById("Institution_databases").style.display = ""
    document.getElementById("Institutions_attrib").style.display = ""
}
else {
    document.getElementById("Institution_databases").style.display = "none"
    document.getElementById("Institutions_attrib").style.display = "none"
};
}
function changeKwsEng() {
var statusCIS= document.getElementById("CIS").checked;
n=0;
for(i=0;i<=document.getElementById("optionsInst").options.length-1;i++) {
          if(document.getElementById("optionsInst").options[i].text=="Most active") {
	n=n+1
          }
 }
if (statusCIS==true) {
      if (n==0) {		
         document.getElementById("optionsInst").options[document.getElementById("optionsInst").options.length] = new Option("Most active");
       } 
}
else {
      if (n!=0) {
        document.getElementById("optionsInst").options[document.getElementById("optionsInst").options.length-1] = null
      } 
} 
}
function changeKwsRus() {
var statusCIS= document.getElementById("CIS").checked;
n=0;
for(i=0;i<=document.getElementById("optionsInst").options.length-1;i++) {
          if(document.getElementById("optionsInst").options[i].text=="Самые активные") {
	n=n+1
          }
 }
if (statusCIS==true) {
      if (n==0) {		
         document.getElementById("optionsInst").options[document.getElementById("optionsInst").options.length] = new Option("Самые активные");
       } 
}
else {
      if (n!=0) {
        document.getElementById("optionsInst").options[document.getElementById("optionsInst").options.length-1] = null
      } 
} 
}